Metallic culvert.



K. J. THORSBY. `METALLIC UULVERT. APPLIUATION 'FILED oo'nso, 1911.

1,017,347. Patented Feb. 13,1912.

2 SHEETS-SHEET 1.

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METALLIC GULVBRT.

I APPLICATION FILED 001.30, 1911.

Patented Feb. 13, 1912.

2 SHEETS-SHEET 2.

'KARL JOHIT THORSBY, OE, OALMND, CALIFORNIA, RGATED CULVF-RT COMPANY, FO'AKLAN),

ASSIGNOR. TG CIQFENIA CFJ- CALIFORNCA, A CORPGP-ATION CIF METLLCCULVERT.

Il, 'iM/,347,

To ai?, whom it' may concern.-

Be it known that LKARL JOHAN THonsY, a subject of the King of Norway,residing at alland,` inthe county of Alameda and State of California,have invented certain new and useful liuprm'ernents inMetallic Culverts,of which the following is a specifica-tion. f

lily invention relatesto the class of culverts, drain pipes, and thelike, and especially to structures of this nature made of sheet metal.

My invention consists in a sheet metal culvert or drain having its endfitted with a novel' rein forcing member.

lt also consists in the novel fitting and arrangement of saidreinforcing member, as l shall hereinafter fully describe.

My invention is vapplicable to culverts, such as are used for drainageunder railroads. highways, or in other places where a durable culvert ordrain pipe is required.

The objects and advantages of mty invention will be fully set forthhereinafter, and

.y will be better understood from an inspection of the accompanyingdrawings, in which- Tfigure l is a side view, broken, of an end sectionof a culvert or of one end of a culvert, showing-the reinforcing memberin its seat, but Anot fully covered therein at its meeting ends. Fig.2-is an end View of the same, showing the covering ton ue bent home.Fig, 3 is a section, enlarge on line wwe of Fig. 2. Fig. is a section,enlarged, on line 41/--3/ of Fig.v 2. Fig. 5 is a side View, broken,Ashowing the application of. the reinforcing member to a. part circleculvert. ll1 ig. 6 is an end View7 partly in section, of the' same.

In Fics. l and 2, theculvert shown is a full circ e. and is made ofcorrugated-sheet metal. Fig. l may indicate either one end of a culvert,or it may represent one end of one of the end sections of a culvert. Inthe foi-nier case each end of the culvert is to be fitted with thereinforcing'- member; and in the latter case but one end will have saidreinforcing member, while the other end section of the` complete culvertwill have its free end provided with the reinforcing member, theintention in all cases being to reinforce both ends of the eiilvert.

in Figs. l to the culvert is l, and the reinforcing member is a rod 2.The end of 'specification of Leiters raient.

Application led October 30, 1911.

ltatented Serial No. $7,466.

the culvert l is bent over at 3 to form a channel in which is seated therod ln order to make a proper joint where the sides of the culvert plateoverlap and to cover therod 2 where its ends meet, the inf nerlying sideof the culvert plate is cui in from the end along a line above the 'edgeof the outerlying side, thereby forming a tongue et; and the end oftheouterlying side is entirely cutaway to the Width of the over-.

ally used in street work or Where the head room is limited and a largewater way is called for, the reinforcing rod 2 will be covered in thebend ,3 of the part circle culverts 5 of Figs. 5 and 6.

It will be noted that in both culverts, full round and part round, whenthey are of the corrugated metal type, the channel formed by the bend 3has for its inner portion the bottom ofal furrow of the corrugation.

By my invention I am able to provide a metal culvert or drain pipe ofincreased strength at the extremities, thereby guarding againstthe'impact of debris, rock, etc., or whatever would tendi to distort thetrue shape of the ends and thus obstruct thev water way. A culvert tlnisreinforced at its ends, especially one which is of comparatively largediameter and made of thin sheets of metal and which would, not of itselfbear a load likely to be placed upon it, is thus made capable ofsustaining heavy travel. This reinforcing rod also acts as a guardagainst the effects of rough handling during shipping, transportationand installing which in most cases is hard to prevent, especially wherethe'culvert sections are of large diameter and great length.

It is also to be noted that a reinforcement as herein disclosed islespecially advantageous in a culvert made of corrugated sheets, whereby reason of the corrugations than its extreme ends. vWith an endreinthe pipe itself is of much greater strength forcing rod thisdifference will be elimi-l nated andthe end of the pipe will beV ofequal strength with its body. Moreover in this' corrugated type ofculvert, by having for the inner portion of the peripheral channel thebottom of a furrow of the corrugation, the reinforcement is compact Aanddoes not project unduly from the general surface of the culvert; it willnot, therefore, be as liable to injur l;

Having thus described my invention what l claim as new and desire tosecure by Letters Patent isy l. A sheet-metal' culvert of the corrugatedmetal type having its end bent to form a peripheral channel, the innerportion of which is the bottom of a furrow of the corrugated metal and areinforcing member seated in said channel.

2. A sheet-metal culvert of full round section with overlapping sides,the innerying side being cut in from the end. to form a tongue, and thecorresponding portion of the outer-lying side being removed, the end i ll i i i of' said culvert and the said itongue being bent to form aperipheral chinnel; and a reinforcing member seated in said channel.

3. A sheet-metal culvert of full round. 25

section with overlapping sides, the innerlying side being cut in fromthe end to form a tongue, and the corresponding portion of theonterlyingside being removed, the end of said culvert and the said tongue beingbent to form a peripheral channel; and a reinforcing member seated insaid channel, and so disposed that its meeting ends are covered by saidtongue.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

KARL JOHAN THORSBY.

Witnesses:

C. W. WEBB, S. A. Fono.

